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Old 02-18-2009, 09:06 AM   #22 (permalink)
PaleMelanesian
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Join Date: Dec 2007
Location: Texas
Posts: 2,320

PaleCivic (retired) - '96 Honda Civic DX Sedan
90 day: 69.2 mpg (US)

PaleFit - '09 Honda Fit Sport
Team Honda
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90 day: 44.06 mpg (US)
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This is from Phil Knox's photo galleries, book illustrations category. Notice how the lowest nose has the lowest drag. Based on this, I'd go for a smooth upper block first, then block the lower as needed. Even if the car has a fairly smooth bottom, there's the car-ground interaction to deal with, which is more draggy than the free air above the car.

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11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
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